JP2005119705A - Flexible packaging body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible packaging body in which, even when a packaged sheet-like object is adhered to an inner side of a packaging film, the adhesion is eliminated by an unsealing work, and the sheet-like object can be easily taken out of an unsealed part after the unsealing work. <P>SOLUTION: In the flexible packaged object, a sheet-like object 1 is seal-packaged in a flat bag shape with a packaging film 2. At least one pleat part 3 is formed in the packaging film (2A and 2B) at least on one side. The pleat part 3 is not sealed except both ends 3a and 3b thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a soft package product in which a sheet-like material is sealed and packaged in a flat bag shape with a packaging film.

  For example, medical adhesive tape products such as patch preparations, beautified skin pack sheets, sheet-like hygiene products such as wet tissue, and relatively small sheet-like materials such as membrane filters, ensure stability, prevent contamination, and are easy to use. For the purpose of improvement or the like, the product form of a soft package product which is sealed and packaged in a flat bag shape with a packaging film is increasing. In many cases, such a soft package product is provided with a cut in a part of the peripheral seal portion for easy opening, and when used, the packaging film is torn from the cut and opened. Then, the content sheet is taken out.

  However, if the sheet-like material housed in the flat bag-like soft packaged product is stored for a long time, it is easy to form a state of adhering to the inner surface of the packaging film, and the soft-packed product is opened and the sheet-like material is taken out. In many cases, it cannot be easily removed. In particular, when the sheet is a sheet with an adhesive tape structure such as a patch preparation, depending on the properties of the adhesive and the storage state of the soft package, the adhesive protrudes from the edge of the sheet, and the packaging film May adhere to the inner surface of the sheet or the back of the sheet (the back of the support of the adhesive tape). In such a case, even if you try to open the package and take out the sheet, The sheet-like material (adhesive tape) is turned over from the separator film, and the adhesive surfaces of the sheet-like material (adhesive tape) adhere to each other. As a result, the sheet-like material is easy to handle after removal. However, there is a problem that the product may not be used as a product.

As a solution to such a problem, Patent Document 1 proposes a method of embossing the inner surface of the packaging material to make it difficult for the contents to adhere to the inner surface of the packaging material. However, this method does not completely prevent the content from adhering to the inner surface of the packaging material, and if it adheres, the difficulty in removing the content will not be eliminated, so this is a sufficiently satisfactory measure. The actual situation is not.
JP-A-7-126156

  The present invention has been made in view of the above circumstances, and the problem to be solved is that, even if the packaged sheet-like material forms a state of adhering to the inner surface of the packaging film, the adhesion is performed by opening operation. It is an object of the present invention to provide a flat bag-like soft package product in which a sheet-like material can be easily taken out from an opening portion after opening.

  As a result of diligent research to solve the above-mentioned problems, the present inventor has folded a packaging film on at least one side of a soft packaging product in which a sheet-like material is sealed and packaged in a flat bag shape with a packaging film. By forming the heel part, it was found that when the packaging film was torn from the peripheral edge of the soft packaging product, the film was torn in the longitudinal direction of the heel part. The present invention was completed based on the above.

That is, the present invention is as follows.
(1) A soft package product in which a sheet-like material is sealed and packaged in a flat bag shape with a packaging film, and at least one ridge is formed on the packaging film on at least one side, and the ridge is formed at both ends thereof. Non-sealed soft-packed products, except that
(2) The flexible packaged product according to (1) above, wherein a cut for opening is formed in a seal part other than the edge part of the collar part at the periphery of the packaged product.
(3) The ratio of the tear strength (maximum value) in the tear direction where the tear strength of the packaging film is maximum and the tear strength (minimum value) in the tear direction where the tear strength is minimum (maximum value / minimum value). ) Is a flexible package according to the above (1) or (2), which is 1.0 to 5.0.
(4) The flexible package according to any one of (1) to (3), wherein the sheet is a sheet having an adhesive tape structure.

  In the soft-packaging product of the present invention, since at least one heel portion other than the end portion of the packaging film on one side is provided in an unsealed state, it does not straddle the sheet-like material inside, and the film When the packaging film is torn in such a direction that the tear of the film hits the unsealed portion of the buttocks, the tear of the film that reaches the buttocks proceeds while inclining in the saddle toward the center of the packaged product. As a result, the unsealed part obtained by further tearing beyond the collar part is in a state where the packaging film is completely separated from the sheet-like material, and a wide opening is formed in which a part of the sheet-like material is completely exposed. Moreover, since the buttocks expand in a bellows shape, the unsealing person can easily pick a part of the sheet-like material by inserting a finger or an appropriate instrument into the package. Accordingly, even a packaged product containing a sheet-like material having an adhesive tape structure can be easily picked and pulled out from the packaged product.

Hereinafter, the present invention will be described in detail.
1 to 4 show a first specific example of the flexible package of the present invention, FIG. 1 is a plan view including a partial perspective view before opening, FIG. 2 is a plan view including a partial perspective view after opening, 3 is a cross-sectional view of a seal portion (III-III line in FIG. 1) including an end portion of the flange portion, and FIG. 4 is a cross-sectional view of the IV-IV line in FIG.

  The soft package product of the present invention is a soft package product in which a sheet-like material 1 is sealed and packaged in a flat bag shape with a packaging film 2 as shown in the example of the soft package product 10, and is packaged at least on one side. The basic structure is such that at least one collar 3 is formed on the film 2, both ends of the collar 3 are sealed, and only the both ends of the collar 3 are sealed. Reference numeral 4 in FIGS. 1 and 2 denotes a sealing portion of the packaging film formed on the periphery (the periphery of the sheet-like product) of the soft package.

  In the present invention, “a soft packaged product in which a sheet-like product is sealed and packaged in a flat bag shape with a packaging film” means that the sheet-like product 1 is covered with the packaging film 2 on both the front and back surfaces of the sheet-like product 1. Means a package obtained by sealing one packaging film 2A covering the surface of the sheet-like material and the other packaging film 2B covering the back surface of the sheet-like material, “3” is a folded portion of the film formed by folding the packaging film 2 in a valley fold → mountain fold → valley fold.

  In the flexible package according to the present invention, the inner surface of the facing film is sealed at both end portions 3a and 3b in the length direction of the flange portion 3 (FIG. 3), and other portions excluding both end portions 3a and 3b. Then, the inner surface of the opposing film is in an unsealed state (FIG. 4).

  In the soft packaging product of the present invention, as shown in the soft packaging product 10 of the example, the packaging film 2 on at least one side of the packaging product has the flange 3 in an unsealed state except for both end portions 3a and 3b. Therefore, a cut is made in the seal portion 4 other than the end portions 3a and 3b of the flange portion 3 on the periphery of the package, or a pre-formed cut is used (reference numeral 5 in FIG. 1 is a cut). When the packaging film 2 is torn from the cut so as not to straddle the sheet-like material 1 and the tear of the film hits the unsealed portion of the flange 3 (ie, FIG. 2, when the vicinity of the seal portion 4 on the periphery of the package is torn along the seal portion 4), the tear of the film leading to the flange 3 is directed in the center of the package in the flange 3. Proceeding while inclining in the (longitudinal direction of the heel part 3), Of exceeding the top line 3A, will split diagonally beyond the fold portion 3 continues further tearing. Accordingly, the packaging film 2 is completely separated from a part of the sheet-like material 1 and is torn in a wide state so as to expose a part of the sheet-like material 1, and the collar portion 3 expands in a bellows shape. Therefore, a part of the sheet-like material 1 is exposed and a space is formed in the opening portion. As a result, the opener can easily pick a part of the sheet-like material 1 from the opening part using a finger or an appropriate device, and the sheet-like material 1 is made of a sheet-like material having an adhesive tape structure. 2, the sheet 1 can be easily picked and pulled out from the packaged product.

  It should be noted that the tear leading to the collar part 3 of the packaging film 2 proceeds toward the center of the packaged product because the part of the collar part 3 closer to the seal part 4 side is close to the seal part, so the degree of freedom of deformation. Is small, and the portion of the collar 3 closer to the center of the package is far from the seal portion, and the collar 3 can move freely in a bellows shape, so if the tear of the film hits the collar 3 it is torn by hand This is because the direction of the force is shifted toward the center, and as a result, the film tear is shifted toward the center of the package.

  2 is the front side of the soft package 10, FIG. 2 shows a state where a part of the periphery of the soft package 10 is pulled to the front side of the package 10 to tear the packaging film 2. As shown in FIG. 1 to FIG. 4, the soft package 10 of the first example is provided with the flange 3 not only on the packaging film 2 </ b> A on the front side of the packaging product but also on the packaging film 2 </ b> B on the rear side. Even in the packaging film 2B on the rear surface side, the progress toward the center direction (longitudinal direction of the flange portion 3) of the package of the tear of the film reaching the flange portion 3 occurs, but the degree is small. In FIG. 2, the packaging film 2 is pulled to the front side of the packaged product 10 and is torn. On the rear side, when the tear hits the sheet-like object 1, the tear is dammed by the sheet-like object 1, This is for tearing along the sheet-like material 1. In addition, like the soft package 10 of this example, the collar part 3 is formed on the packaging film 2 (2B) also on the rear surface side opposite to the pulling direction of the packaging film 2 when the package is opened. By doing so, since the collar part 3 becomes bellows-like in the packaging films 2A and 2B on the front and rear surfaces of the packaged product when opened, the space at the opening can be further expanded, and the sheet-like material can be taken out more. There is an advantage that it becomes easy.

  On the other hand, FIG.5 and FIG.6 shows an example of the soft package goods which formed the collar part 3 only in the film 2A for packaging of one surface side, FIG. 5 is a top view including a partial perspective view before opening, FIG. FIG. 4 is a plan view including a partial perspective view after opening. Also in the soft package 20 of the second specific example, as shown in FIG. 6, when the film tears in the direction in which the tear of the film 2 </ b> A hits the unsealed portion of the flange 3, it reaches the flange 3. The tear of the film 2A proceeds while inclining in the collar part 3 in the center direction of the package (longitudinal direction of the collar part 3), exceeds the peak 3A of the peak of the collar part 3 and continues to tear. As shown in FIG. 2, a part of the sheet-like material 1 is exposed and a space is formed in the unsealed portion. Therefore, the unsealing person can easily pick a part of the sheet-like material 1 from the opening part by using a finger or an appropriate instrument, and can easily pick and draw the sheet-like material 1 from the package. A soft packaged product in which the collar portion 3 is formed only on the packaging film 2A on one surface side of the packaged product, such as the soft packaged product 20 of the second example, is the same as that of the flexible packaged product 10 in the first example. Compared to the packaging film on both sides of such a packaging product, the manufacturing apparatus for manufacturing the packaging product can be simplified, and the amount of packaging film used can be reduced. There is an advantage that it is advantageous. In addition, like the soft packaging product 10 of the first example, the opening portion at the time of opening is equivalent to the soft packaging product in which the flange portion 3 is formed on the packaging films 2A and 2B on both sides of the packaging product. In order to form the expansion of the space, it is necessary to increase the width (T1) by the amount of the one collar portion 3.

  In the present invention, the sheet-like product 1 (the contents of the soft-packaging product) 1 that is a soft-packaging product is not particularly limited, and sheet-like products for various uses can be used as the soft-packaging product of the present invention. Specifically, for example, an adhesive tape preparation (patch) containing a drug in the adhesive layer, a medical adhesive tape material such as an adhesive tape for protecting the skin (mucosa), a sheet-like guard such as a wet tissue, a skin beautifying pack sheet, etc. Material products, membrane filters, etc. As described above, conventionally, in this type of flexible package, when a sheet-like material having an adhesive tape structure is accommodated, the adhesive protrudes from the edge portion of the sheet-like material, and the inner surface of the packaging film or the sheet-like material. Even if the adhesive adheres to the back (back surface of the adhesive tape support, etc.), the package is opened, and the sheet-like material is taken out, it is difficult to take it out. (Adhesive tape) turns over from the separator film, and the adhesive surfaces of the sheet-like material (adhesive tape) adhere to each other. As a result, the handling property of the sheet-like material after removal may become extremely poor. However, in the flexible package of the present invention, as described above, by tearing the packaging film 2, at least a part of the sheet 1 is completely separated from the inner surface of the packaging film 2. Even if it is a sheet-like material 1 having an adhesive tape structure, the sheet-like material 1 is removed from the inner surface of the packaging film by picking a part of the exposed sheet-like material 1 with a finger or an appropriate instrument. It can be taken out while being peeled off, and the above problems can be solved. Accordingly, when a soft packaged product having a pressure-sensitive adhesive tape structure is produced, the advantages of the soft packaged product of the present invention are particularly prominent. Furthermore, among adhesive sheets with adhesive tape structure, medical adhesive tape materials such as adhesive tape preparations (patch) containing a drug in the adhesive layer, and adhesive tapes for protecting the skin (mucosa) are used in the medical field. In this case, the flexible packaging product of the present invention is particularly suitable as a packaging product for medical adhesive tape material because it is highly necessary to quickly and surely take out the adhesive tape material and perform a quick treatment.

  In the present invention, when producing a flexible package of a sheet-like material having a pressure-sensitive adhesive tape structure, the structure of the sheet-like material is not particularly limited, but usually a three-layer structure of a support, a pressure-sensitive adhesive layer and a separator (of a pressure-sensitive adhesive tape). The basic configuration is generally used.

  The material of the support is not particularly limited, but is preferably a material that does not hinder skin followability, that is, a material that easily stretches and contracts according to the elongation of the skin surface. Specifically, polyester, nylon, A single film made of one or more kinds of various plastic materials such as polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, polytetrafluoroethylene, and surrin, or a laminate thereof. Films or those obtained by laminating woven fabrics or nonwoven fabrics on these films can be used.

  As the pressure-sensitive adhesive, various known pressure-sensitive adhesives such as rubber-based, hot-melt-based, acrylic-based, and emulsion-based adhesives used for pressure-sensitive adhesive tapes for various purposes can be used. Also, the medical adhesive tape material is not particularly limited as long as it is used as a medical adhesive, but it causes rashes on the skin surface when attached to the skin surface. None is preferred. For example, various adhesives conventionally used as medical adhesives such as acrylic adhesives, rubber adhesives, silicone adhesives, vinyl ether adhesives, and vinyl ester adhesives are used. In the case of a tape preparation, for example, a known drug having percutaneous absorption, which can be dissolved in the adhesive, is contained in the adhesive.

  The material of the separator is not particularly limited as long as it is used as a normal separator. Examples thereof include various plastic materials such as polyethylene, polypropylene, polyester, polyvinyl chloride, polyamide, ethylene-propylene copolymer, and polystyrene, and a plastic film obtained by blending one or more of these materials is used. Moreover, metal films, such as aluminum foil, can be used and you may use a laminated body with the said plastic film as needed. Furthermore, high-quality paper, glassine paper, parchment paper, or high-quality paper obtained by laminating polyethylene or the like on these release papers can also be used.

In the present invention, the size and shape of the sheet-like product (contents of the soft package product) 1 are not particularly limited, but the size is preferably a size suitable for handling as a sheet-like product. On the other hand, when a thick sheet-like material is accommodated, the thickness of the central part becomes sufficiently thick compared to the peripheral part of the soft packaged product. Since a large gap (space) is formed, the necessity of utilizing the effects of the present invention is reduced. Therefore, the size of the sheet 1 is generally 20～25000Mm ^2, the magnitude preferably having an area of 100～15000Mm ^2, the thickness of the sheet is generally 0.01Mm～4mm, preferably 0. It is 02 mm to 2 mm.

  The sheet-like object 1 may be in the form of a sheet, and the outer peripheral shape (contour) is not particularly limited, and is rectangular (square, rectangular), circular (perfect circle, elliptical), triangular, polygonal The thing of various shapes, such as these, is included. In addition, the sheet-like thing 1 in this invention may contain the material which is difficult to measure thickness accurately, such as a woven fabric and a nonwoven fabric, as the constituent material.

In view of handling properties or the like of the sheet material, the weight per unit area of the sheet is preferably from ^{0.001g / cm 2 ~0.4g / cm 2} , 0.002g / cm 2 ~0.2g / cm 2 Is preferred.

  The packaging film 2 used in the present invention can be used without particular limitation as long as it is used as a packaging film for various conventionally known sheet articles, but the tear strength in the tear direction that maximizes the tear strength. The ratio (maximum value / minimum value) between the (maximum value) and the tear strength (minimum value) in the tearing direction where the tear strength is minimized is preferably in the range of 1.0 to 5.0. What is in the range of 0-4.0 is more preferable. When the ratio of the tear strength is greater than 5.0, the tearing at the time of opening the soft package product is difficult to smoothly change the direction of the tear after the film tear hits the buttock. Since it becomes difficult, it is not preferable. In terms of easy-openability of the soft packaged product, the packaging film preferably has a tear strength maximum and minimum values in the range of 1 to 100 gf, and those in the range of 5 to 50 gf. More preferred. Here, the tear strength is a value measured by a measurement method described later.

  In the present invention, the packaging film may be a single layer film or a composite film in which two or more kinds of films (layers) are combined as long as it has the above tear strength characteristics. The base film in the single layer film or the composite film may be an unstretched film, a uniaxially stretched film, or a biaxially stretched film, and the material of the film is not particularly limited. Polyethylene terephthalate, polyethylene naphthalate, polypropylene Polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyvinylidene chloride, polystyrene, nylon and the like can be used. The sealant layer of the composite film is not particularly limited as long as the heat sealability is good. For example, polyacrylonitrile, polyethylene, cellophane, unstretched polypropylene, or the like can be used. In the case where a tape preparation containing a drug in the adhesive is used as a sheet, it is preferable to use polyacrylonitrile as a sealant for the purpose of reducing drug adsorption. When it has a sealant, the means for adhering the sealant and the substrate film may be one using an adhesive or utilizing heat fusion. If necessary, the base film may be composed of a plurality of films. In this case, aluminum foil or paper may be laminated in addition to the base film and sealant film, and the surface may be polychlorinated. Vinylidene, alumina, or the like may be coated, or aluminum, aluminum oxide, or silicon oxide may be deposited.

  In the soft packaged product of the present invention, the sheet-like product 1 is packaged with the packaging film 2 (that is, the front and back surfaces of the sheet-like product 1 are covered with the packaging film 2). It is manufactured by sealing the packaging film disposed on the front surface side of the sheet-like material and the packaging film disposed on the back surface side. Under the present circumstances, the packaging film which formed the collar part 3 in at least one part is used as a packaging film of the at least one side of the packaging film arrange | positioned at the surface side and back surface side of a sheet-like material.

  The production of the soft packaging product of the present invention can be industrially produced continuously by an automatic packaging machine, that is, when the front side packaging film and the back side packaging film are fed out, at least one of the packaging film feed directions The flexible packaging of the present invention is formed by feeding out while forming a collar portion parallel to the sheet, sandwiching the sheet-like material, sealing the periphery of the sheet-like material (heat sealing), and punching it into the shape of the desired flexible packaging product The product can be manufactured continuously. The sealing method is usually performed by heat sealing, but if it can be sealed with the sheet-like material covered with a packaging film, it can be sealed using, for example, an adhesive or double-sided tape, without using heat sealing. May be. The seal pattern is not particularly limited as long as both end portions of the collar portion are sealed and the other end portions are not sealed, and the seal pattern on the periphery of the package is not particularly limited. Any of the seal patterns may be used. The soft packaging products 10 and 20 of the first and second examples are formed by a four-side seal.

  The seal width in the flexible package, that is, the width (T2) of the seal portion 4 is not particularly limited, but is generally selected in the range of 1 to 20 mm. The shape of the goblet of the seal portion can be arbitrarily selected from a flat shape, a wave shape, a mesh shape, a diagonal mesh shape, a three-wire seal type, and the like. In addition, when making a cut in the seal part, the shape of the cut is arbitrary, such as a straight line, a triangle, a semi-circle, etc., but in order to ensure the sealing inside the packaged product, the cut is not to the inside of the seal part Form so as not to reach.

  In the present invention, the outer peripheral shape (contour) of the soft packaged product is not particularly limited, and for example, a square shape (square shape, rectangular shape), a circular shape (perfect circle shape, elliptical shape), a triangular shape, a pentagon or more However, when punching adjacent soft packages in the industrial production of packaging products, the amount discarded as punching waste can be minimized, and the yield of packaging film in the packaging process can be reduced. From the viewpoint of improvement, it is preferable that the flat bag is substantially square (square or rectangular). Substantially square means that the overall appearance should be square, and the corners of the four corners are rounded (rounded in a circular arc shape), and the angles of the corners of the four corners are not exactly right angles. Also good. Further, the outer peripheral contour line is not limited to a straight line, and may be a wavy line, a zigzag line (sawtooth shape), or a curved line.

  The outer shape (contour) of the soft packaged product of the present invention is the same as that of the soft packaged product 10 (FIGS. 1 to 4) of the first example and the soft packaged product 20 (FIGS. 5 and 6) of the second example. When the shape is substantially square, the length of one side of the square is preferably selected within the range of 2 to 20 cm from the viewpoint of the handleability of the packaged product.

  In the flexible package of the present invention, as shown in the first example of the flexible package 10 (FIGS. 1 to 4) and the second example of the flexible package 20 (FIGS. 5 and 6), the collar 3 May be formed only on the packaging film 2 (2A) on one side, or may be formed on the packaging film 2 (2A, 2B) on each side of both sides. Moreover, the number of the collars 3 in the packaging film 2 on one surface side may be at least one, and the number is not particularly limited, but the viewpoint of reducing the amount of packaging film used per packaged product. From the above, it is preferable to form one hook portion 3 on the packaging film on one side or one on each side of the packaging film on both sides. The width (T1) of the heel part 3 is not particularly limited, but it is 3 mm or more because of the ease of putting fingers and instruments into the space generated inside the soft package when opened and the ease of forming the heel part. It is preferable that it is 5 mm or more. However, if it is too large, the amount of packaging film used will increase and the cost will increase, so 50 mm or less is preferable, and 30 mm or less is more preferable. In addition, since it becomes difficult to stack a plurality of soft packaging products when the eaves portion 3 is standing upright, usually, the eaves portion 3 is formed of the packaging film 2 as shown in FIGS. Lay it close to the film surface (fold it) to store and distribute the soft package. Moreover, there is no restriction | limiting in particular about the direction which lays down the collar part 3 (folding). That is, in FIGS. 3 and 4, the flange 3 (3a, 3b) is folded on the edge side where the cut 5 of the soft package 10 is formed, but the direction opposite to that in FIGS. The flange 3 may be folded on the side of the package 10 that is opposite to the edge on which the cut 5 is formed, and one of the two flanges 3 is the end on which the cut 5 of the flexible package 10 is formed. You may fold to the side, and you may fold the other to the edge side opposite to the edge which formed the cut | interruption 5 of the soft package 10. Regardless of the folding direction of the collar part 3, when the tear hits the collar part 3, the direction of the tear changes toward the center of the flexible package 10.

  In the soft packaged product of the present invention, a break for opening (a break which becomes a tear start end at the time of opening) is not necessarily essential, but the tear of the film does not straddle the sheet-like material inside, and the heel part is not yet opened. In order to clearly indicate the preferred tear start position to ensure that a favorable tearing state in which the film will be torn reliably is obtained in the direction of hitting the seal portion, a cut is provided at the periphery of the package. In the case where the flexible package has a rectangular shape, as shown in FIGS. 1 and 5, the longitudinal direction of the heel part 3 is near the corner of the side substantially parallel to the longitudinal direction of the heel part 3. It is preferable to form a cut in a direction substantially orthogonal to the above.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples. However, the present invention is not limited to the following examples.

Example 1
In an atmosphere of nitrogen, 5 parts by weight of acrylic acid and 95 parts by weight of 2-ethylhexyl acrylate are copolymerized with 100 parts by weight of an acrylic copolymer, 100 parts by weight of isopropyl myristate, and trifunctional as a crosslinking agent. 0.15 parts by weight of isocyanate (manufactured by Nippon Polyurethane Co., Ltd., Coronate HL) is blended in ethyl acetate, and this is coated on a 75 μm thick polyester separator, dried to a thickness of 60 μm, and dried to adhere An agent layer was formed. Next, an adhesive layer was bonded to the polyester nonwoven fabric side of the laminated support of polyester film (2 μm thick) / polyester nonwoven fabric (12 g / m ² ), and the adhesive was crosslinked by heat treatment to prepare a patch preparation. This was cut to a size of 5 cm × 5 cm. The weight per unit area (1 cm ² ) of this patch preparation was 0.015 g / cm ² .

  Next, with a packaging film of “biaxially stretched polyester film (12 μm thickness) / polyethylene film (15 μm thickness) / aluminum (7 μm thickness) / polyethylene film (20 μm thickness)”, for both sides packaging For each of the films, a 1 cm wide ridge is formed, the patch preparation is sandwiched in the approximate center, the entire periphery of the soft package is heat sealed 5 mm wide, and one side of the heat seal part on one side parallel to the ridge A flexible package (Example: size 8 cm × 8 cm) of Example 1 was produced by making a 2 mm long cut at a position 1 cm from the end of the above.

Example 2
A flexible package was produced in the same manner as in Example 1 except that the ridge was formed on one packaging film and the ridge was not formed on the other packaging film.

Example 3
A flexible package of Example 3 was produced in the same manner as Example 1 except that “biaxially stretched polyester film (12 μm thickness) / polyethylene film (50 μm thickness)” was used as the packaging film.

Example 4
As in Example 1, except that “biaxially stretched polyester film (12 μm thick) / extruded polyacrylonitrile film (30 μm thick)” was used as the packaging film with the polyacrylonitrile film side inside. A soft package was produced.

Comparative Example 1
A flexible packaged product of Comparative Example 1 was produced in the same manner as in Example 1 except that the heel portion was not formed on both packaging films.

Comparative Example 2
The entire area of the buttocks of the soft package produced in Example 2 was heat-sealed to produce a soft package product of Comparative Example 2.

  For the packaging films used in the above Examples and Comparative Examples, the tear strength was measured by the following method, and the results are summarized in Table 1.

[Measurement method of tear strength]
The tear strength of the packaging film used in each example and each comparative example was measured by the following procedures (1) and (2).

(1) Preparation of test piece As shown in FIG. 8, the cut line is directed in the direction of arrows a to h so that the tear strength in the eight directions (directions a to h) shown in FIG. 7 can be measured. Eight test pieces having a shape (size 2 cm × 4 cm, cut length 2 cm) are cut out.

(2) Measurement of tear strength For each of the above eight test pieces, a compressive stress measurement tester (SUN RHE0 METER CR-150, CR-200D) is applied in accordance with JIS K 7128 “Plastic film and sheet tear test method”. , SUN SCIENTIFlC C0., LTD), the maximum value of the tear load when the test piece is torn at a speed of 200 mm / min is measured.

  Table 1 below shows the results, and the ratio (maximum value / minimum value) of the maximum value and the minimum value among the tear strengths in the eight directions is also described.

  After the soft packaging obtained in each Example and each Comparative Example was stored at 70 ° C. for 2 weeks, the ease of tearing of the soft packaging and the ease of taking out the patch were sensorially evaluated by the following methods. The results are shown in Table 2 below.

It is a top view including a perspective view in a part of soft packaged goods (before opening) of the 1st example of the present invention. It is a top view including a perspective view in a part of soft packaged goods (after opening) of the 1st example of the present invention. FIG. 3 is a cross-sectional view (cross-sectional view taken along line III-III in FIG. 1) of the seal portion including the end portion of the flange portion in FIG. 1. It is sectional drawing in the IV-IV line of FIG. It is a top view including a perspective view in a part of soft packaged goods (before opening) of the 2nd example of the present invention. It is a top view including a perspective view in a part of soft packaged goods (after opening) of the 2nd example of the present invention. It is a top view for demonstrating the collection method of the test sample of the tear strength from the film for packaging. It is a top view of the test sample cut out from the film for packaging.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet-like material 2 Film for packaging 3 Edge part 3a, 3b Edge part of collar part 4 Sealing part 5 Cut | interruption 10 Soft packaging goods of flat bag shape

Claims (4)

  A flexible packaging product in which a sheet-like material is sealed and packaged in a flat bag shape with a packaging film, and at least one ridge is formed on the packaging film on at least one side, and the ridge is sealed except at both ends. A soft package characterized by not being made. The flexible packaged product according to claim 1, wherein a cut for opening is formed in a seal portion other than an end portion of the flange portion at the periphery of the packaged product. The ratio (maximum value / minimum value) between the tear strength (maximum value) in the tear direction where the tear strength of the packaging film is maximum and the tear strength (minimum value) in the tear direction where the tear strength is minimum. The soft packaging product according to claim 1 or 2, which is 0.0 to 5.0. The flexible packaging product according to any one of claims 1 to 3, wherein the sheet-like material is a sheet-like material having an adhesive tape structure.

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